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Disk Journaling not a big deal
Authored by: SOX on Apr 07, '03 11:20:01PM

Reading what apples says about I think you can expect journalling to take a hit of
virtually zero on reads from disk
around 10% on writes to disk on average.

Note however writing to disk is not something you really do much of (compared to reading from disk). furthemore just because your writes are 10% slower does not mean your computer is 10% slower or tied up. Your computer can multi-task and while its waiting for disk seeks and such it may well be doing other things.

if 10% on write is keeping you up at nights (and personanlly disk error keep me up, not disk writes), then you can change the settings on journaling.

you do not have to journal your entire drive. you can selectively journal different chinks of the file system.
removing journalling from the swap partition, or /tmp makes complete sense and constitutes the majority of your disk activity when things seem to be getting slow anyhow. you could also create a filesystem directory that has journaling turned off where you can put all the large files you are writing that dont need the extra security provided by journalling (e.g. large photoshop files).



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